Applying chex.dataclass wrapper yields error: Expected no arguments to class constructor (reportGeneralTypeIssues)

[carlosgmartin]

Applying the chex.dataclass wrapper to a class yields the following error:

import chex

@chex.dataclass(frozen=True)
class Class:
    x: int

Class(4)

$ pyright --version
pyright 1.1.337
$ python3 --version
Python 3.11.6
$ python3 -c "import chex; print(chex.__version__)"
0.1.85
$ pyright test.py
/Users/user/Desktop/test.py
  /Users/user/Desktop/test.py:7:1 - error: Expected no arguments to "Class" constructor (reportGeneralTypeIssues)
1 error, 0 warnings, 0 informations 

[erictraut]

This is a bug in the chex library. The chex.dataclass decorator has no type annotations despite the fact that the package contains a "py.typed" marker file. Please report the problem to the maintainers of this library.

[carlosgmartin]

@erictraut What would be the correct type signature for chex.dataclass, to avoid this error?

[erictraut]

I recommend looking at the stdlib dataclass class in the typeshed dataclass.pyi stub.